New ultrashort pulsewidth measurement technology based on interference jitter and FPGA platform  

作　　者：Jin Li Yanbo Dou Lixin Wang Jinhai Zou Yu Ding Hang Wang Qiujun Ruan Zhipeng Dong Zhengqian Luo 李瑾;窦妍博;王立新;邹金海;丁宇;王航;阮秋君;董志鹏;罗正钱(Department of Electronic Engineering,Xiamen University,Xiamen 361005,China;Science and Technology on Electro-Optical Information Security Control Laboratory,Tianjin 300308,China)

机构地区：[1]Department of Electronic Engineering,Xiamen University,Xiamen 361005,China [2]Science and Technology on Electro-Optical Information Security Control Laboratory,Tianjin 300308,China

出　　处：《Chinese Optics Letters》2022年第3期46-51,共6页中国光学快报（英文版）

基　　金：This work was supported by the National Science Fund for Excellent Young Scholars(No.62022069);the Fundamental Research Funds for the Central Universities(No.20720200068);the Shenzhen Science and Technology Project(No.JCYJ20210324115813037).

摘　　要：Conventional ultrashort pulsewidth measurement technology is autocorrelation based on second-harmonic generation;however,nonlinear crystals and bulky components are required,which usually leads to the limited wavelength range and the difficult adjustment with free-space light alignment.Here,we proposed a compact all-fiber pulsewidth measurement technology based on the interference jitter(IJ)and field-programmable gate array(FPGA)platform,without requiring a nonlinear optical device(e.g.nonlinear crystal/detector).Such a technology shows a wide measurement waveband from 1 to 2.15μm at least,a pulsewidth range from femtoseconds to 100 ps,and a small relative error of 0.15%-3.8%.In particular,a minimum pulse energy of 219 fj is experimentally detected with an average-power-peak-power product of 1.065×10^(-6)W^(2).The IJ-FPGA technology may offer a new route for miniaturized,user-friendly,and broadband pulsewidth measurement.

关 键 词：pulse width measurement interference jitter FPGA platform optical device 

分 类 号：TN791[电子电信—电路与系统] TN256